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Genetic Variability in CLU and Its Association with Alzheimer's Disease
Guerreiro, Rita J.; Beck, John; Gibbs, J. Raphael; Santana, Isabel; Rossor, Martin N.; Schott, Jonathan M.; Nalls, Michael A.; Ribeiro, HelenaRecently, two large genome wide association studies in Alzheimer disease (AD) have identified variants in three different genes (CLU, PICALM and CR1) as being associated with the risk of developing AD. The strongest association was reported for an intronic single nucleotide polymorphism (SNP) in CLU. To further characterize this association we have sequenced the coding region of this gene in a total of 495 A...
Association of HFE common mutations with Parkinson's disease, Alzheimer's disea...
Guerreiro, Rita J.; Brás, José M.; Santana, Isabel; Januário, Cristina; Santiago, Beatriz; Morgadinho, Ana S.; Ribeiro, Maria H.; Hardy, JohnBackground: Pathological brain iron deposition has been implicated as a source of neurotoxic reactive oxygen species in Alzheimer (AD) and Parkinson diseases (PD). Iron metabolism is associated with the gene hemochromatosis (HFE Human genome nomenclature committee ID:4886), and mutations in HFE are a cause of the iron mismetabolism disease, hemochromatosis. Several reports have tested the association of HFE var...
Frontotemporal dementia and mitochondrial DNA transitions
Grazina, Manuela; Silva, Filipe; Santana, Isabel; Santiago, Beatriz; Mendes, Cândida; Simões, Marta; Oliveira, Miguel; Cunha, Luís; Oliveira, CatarinaFrontotemporal dementia (FTD) is the second most common type of primary degenerative dementia. Some patients present an overlap between Alzheimer's disease (AD) and FTD both in neuropathological and clinical aspects. This may suggest a similar overlap in physiopathology, namely an involvement of mitochondrial DNA (mtDNA) in FTD, as it has been associated to AD. To determine if mtDNA is involved in FTD, we perfo...
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